Improvement in apparatus for filling and emptying oil-tanks



D. B l R D S A L L Improvement in Apparatus for Filling and Emptying Oil Tanks.

No.123,859. Patented Feb. 20,1872.

W it nesses jlpgvemor v I! v UNITED STATES PATENT OFFICE.

DAVID BIRDSALL, OF BROOKLYN, NEW YORK, ASSIGNOR TO THOMAS JOYCE,

OF SAME PLACE, AND JOHN D. AVEBILL, OF NEW YORK CITY.

IMPROVEMENT IN APPARATUS FOR FILLING AND EMPTYING OIL-TANKS.

Specification forming part of Letters Patent No. 123,859, dated February 20, 1872.

To all whom "it may concern:

Be it known that 1, DAVID BIRDSALL, of Brooklyn, in the county of Kings and State of New York, have invented a new and valuable Improvement in Suction-Pump, &c.; and I do do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing making a part of this specification and to the letters and figures of reference marked thereon.

This invention has relation to an improved suction-pump for discharging oil-chambers, gas-reservoirs, and other purposes, where a smooth and even flow is required; and it consists in the construction and novel arrangement of the water and air-chambers and tubes of communication hereinafter described. It is also intended to serve as a means for evening or equalizing the action of an ordinary air or suction-pump, and is designed for use chiefly in connection with gas apparatus where an even flow is of great importance.

In the accompanying drawing, the letter A designates an air-tight-chamber placed above a similar air-tight chamber, B. 0 represents the inlet-pipe, inserted through the Wall of A, and adapted, by means of an ordinary coupling or otherwise, to be connected with the pipe from the reservoir or vessel to be discharged. D represents a tube passing through the chamber A into the chamber B. This tube is provided with a plug or packing-box at its upper end, through which passes a rod, to. An opening, 0, is made in the tube D at a point near the bottom of the chamber A, and below this opening a valve-seat, I), is formed to suit the valve 61 constructed at the end of the rod a. At some point between the opening 0 and the top of this tube a female screw-thread is designed to be formed in the tube to operate in connection with a thread upon the rod to. The top of this rod is fitted for the application of a key, or otherwise adapted to be turned from its upper end, for the purpose of raising or lowering the valve. E represents a tube passing from the lower chamber B upward through the chamber A. This tube is provided with a regulating-cock, e, at its upper end.

The operation of this pump is as follows: The chamber A having been filled with water, the pipe from the carburetiug-tank or other reservoir which it is desired to empty is connected at the coupling of the pipe 0. The valve-rod a is now raised toopen communication between the water-chamber A and the air-chamber B. Finally the cock 0 is opened for the escape of the air from the lower chamber B. The water will now flow from the tank A into the chamber B, and its place in the upper or vacuum-chamber will be supplied by the oil or gas from the reservoir being discharged.

For ordinary purposes the power of the water-pump above described will be sufficient; but its force may be increased by the application of an air or suction pump to the tube E; and in this connection it serves an important purpose in preventing the strokes of the piston of the air-pump from interfering with the steady and even flow from the oil-reservoir.

The advantages of this invention are chiefly discernible in its application to carburetors and other reservoirs connected with the pipes by which illuminating .gas is supplied for 0011- sumption.

Olm'm.

What I claim as my invention is-- The equalizing-pump for discharging oil-reservoirs, consisting of the air-tight chambers A and B, placed one over the other, and separated by a horizontal partition, the inlet-tube G, valve-tube D, valve-rod a, and the air- 

